George walker



G. WALKER.

Hot Air Furnace.

' N0 .,3,623. r Patented June 10, 1844.

ATENT FFTCE.

GEORGE WALKER, on NEW HAVEN, CONNECTICUT.

FURNACE FOR HEATING BUTLDINGS.

To (ZZZ whom, it may concern Be it known that I, GEONXVALKER, of thecity and county of New Haven and State of Connecticut, have invented, anew. and

useful Improvement in Furnaces for Heating Buildings, and do herebydeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, making a partof this specification, in which Figure l is a sideelevation ofcombustion chamber and drums. Fig. 2 is a ground plan; Fig. 3, a frontelevation of furnace set in masonry; Fig. 4, back elevation of furnaceset in masonry; Fig. 5, drum and fiat or horizontal deflector detached.

The nature of my invention consists of so arranging a series of drumsabove and in the rear of the combustion chamber, as to produce a greatamount of heat from the smallest possible quantity of fuel'and to sufferthe least waste of heat by means of its escape through the smoke pipe orchimney and to be easily adjusted to fit different 10- calities ashereafter described.

The combustion chamber, A, made of cast iron has a cap (B) which fits onto it, in the front of which there is a door through which fuel issupplied. There is an aperture in the cap at the top into which fits thefront drum (D) of the series. The lower half of the drum (D) is in theform of a frustum of an inverted cone, the lower part just fitting theaperture at the top of the cap (B). Around the upper edge, there is aflange on to which the flange of the upper half of the drum fits, theupper half being a section of a spheroid in the top of which there is acircular aperture.

YVithin the drum so formed there is a flat horizontal deflector (E) Fig.5 (this may also be seen by the dotted line within the drum). It hasaround its outer edge projections that keep it in its place, leaving aspace around it so as to allow the products of combustion to pass allaround between it and the outside of the drum. Into the aperture at thetop of the drum a short pipe fits which connects the drum with thehorizontal pipe (F, G, 11,) near one end of it. In the rear of thecombustion chamber and drum thus described, are placed two more drums ofthe same form and construction one above the other, the upperone (whichis on level with the front one) connects also to the pipe at (G).

In the rear of these two drums (that they may be as far from the combostlon chamber as possible and thus be in the coolest part of the furnace)there are also two more. drums, of the like form and construction, whichare also placed one above the other in the same horizontal line withthose already described, the upper end of which connects with the pipe(F G) at (H). The two lower drums in the rear of the combustion chamberconnect with each other by a round or square pipe (I). This pipe passesin a line from one drum to the other and it connects with the drums attheir lower section. The pipe (F, G, 1-1,) is closed at one end (F) andthe other end is con nected with the pipe that carries off the smokeinto the chimney. Between (G) and (H) there is a damper. hen this isopen, the fire passes up through the front drum and directly through thepipe to the chin1- ney, but when the damper is closed the fire passesdown through the series of drums, situated in the center- 0f the pipe(G) from thence it passes through the round or square pipe (1), and upthrough the drums the most remote from the combustion chamber (so as tobe as cool as possible) into the upper pipe at (H) and from thencethrough the smoke pipe into the chimney, the heat being spread over theinward surface of the drums by means of the horizontal deflector Theapparatus above described is inclosed in the usual way by a brick wallin the form of a parallelogram (a ground plan of which is shown in Fig.2.) There is an outside wall (J) of the thickness of a brick, inside ofwhich there is another wall (K) leaving a space between of about 4inches, those are built up to the height above the horizontal pipe (F,G, 11,) and their top is covered by means of brick, flat stones or arch.Near the top of the brick chamber in the outside vall, there is anaperture (L) (Fig. 4C) for the admission of cold air, which passes downthe space between the two walls and through the openings (M) (Fig. 2)made through the inside wall at the bottom, and thence around the drumsand combustion chamber, by means of which it is heated and ascends tothe top of the brick air chamber, it then passes off through the pipes(N) Figs. 3 and 4 which extends through both walls from the air chamber,to the apartments to be heated in the usual way.

The drums and pipe are so arranged that they can be easily cleaned, theashes by any imote from the combustion chamber, is of course in thecoolest part of the furnace, and therefore the least possible heatwillescape by means of it. The drums are also so arranged that the heat inpassing through them is continually receding from the combustion chamberinto the coolest part of the air chamber, thereby reducing thetemperature of the current in passing off, to the lowest degree possibleand thus avoiding a Waste of heat. The cap (B) Fig. 1 is so connected bya throat With the door (C) through Which the fuel is passed, that thethroat can be made to pass through the brick Wall in either of threedirections (P, R, 8,) Fig. 2 as the room, location of the coal bin, orother motive may suggest.

I do not claim the part of the above apparatus; but

What I claim as my invention and desire to secure by Letters Patent is-The arrangement of the drums and combustion chamber in the mannerandvfor the purpose above specified.

' GEO. WALKER. lVitnesses:

L. C. DoNN, R. B. GRIFFIN.

